Just noticed that the Microsoft SSMA team have given a final release to Verion 4.0 of their SSMA tools last week: http://www.microsoft.com/sql/solutions/migration/default.mspx
Definately check these out if you have any legacy
databases lying around.
Converting a relational database from Sybase to SQL Server is relatively easy compared to a programming conversion from J2EE to C#.
Nevertheless, a lot of business logic in your stored procedures can cause you to have to rewrite them, and these tools will at the very least identify these problems for you, and even give a rough development time estimate.